hi all, firstly wet dash, rough cast, slop dash, aka, must be cured before use. before wetdash can be applied to a wall it is very important to have your mix properly prepared. if you use dash that is not cured the probability of the finished walls cracking are high, these crackes show in the shape of a birds feet, known in the trade as [crow feet cracks] you can notice these if you look at work where the dash was not cured, these cracks are multiple and do cause water to seep behind to your base coat and causes bolstering of your finished work a job that is supposed to do a lifetime , wont see a few seasons. this is a recipe handed down from my great grandfather to his, to mine, to me, never any crackes. lay out a large peace of polythene beside your mixer work out the area that you are dashing as not to have to much dash left over, no cement is required yet, what you need to do is mix a ratio of four stone two sand one lime mix this to a nice consistency not a slurry wet mix, empty content onto polythene and continue keeping mix the same until you have enough to cover area you will dash.remember no cement yet, cover the dash with polythene so no rain can get at it this would wash the lime from the sand and stone. after one week the dash will be cured and ready for mixing and applying to walls can begin, you will notice the cured dash will be very hard and will need a pic axe to break it up before you mix it filling your mixer at a ratio of three to one of cement to a consistency well mixed and broke up avoiding lumping the uniformity of the finished wall depends on the skill of the man at the mixer, white sand and cement when used in wet dash looks a far better job then the gray. when you key a scratch coat or base coat for wet dash use a heavy yard brush and not a pronged scratcher used in dry dashing as lines can be seen in cases of misses and it is the norm for wet dash to use this process . I hope this can be helpfull to anyone who gives it a try, ps use protective eye glases and gloves lime burns and can really hurt when it splashes to eyes.